The Marconi IFR Aeroflex 3901 is a 1 GHz advanced radio test system engineered for development, manufacturing, and field service of professional mobile communication equipment. Built on digital architecture, it delivers faster and more accurate measurements across RF power, receiver sensitivity, and modulation analysis. The platform integrates signal generation, spectrum analysis, audio testing, and digital communications capabilities in a single instrument, supporting everything from analog FM to advanced digital protocols including P25 and TETRA.
Technical Specifications
Frequency Coverage
• Continuous operation: 1 MHz to 1 GHz
RF Power Measurement
• Direct input capability: Up to 125 W
• Low-power antenna port input for sensitive measurements
• Full input protection against overage
RF Receiver
• Frequency range: 10 MHz to 1.05 GHz (usable from 1 MHz)
• Sensitivity: -100 dBm (10 dB SINAD, FM, 25 kHz, 6.25 kHz FM deviation, 300 Hz to 3.4 kHz AF filter, pre-amp ON)
Signal Generator
• RF output level: -130.0 dBm to 0.0 dBm
• Level offset: ±40.0 dB
• Output accuracy: ±1 dB (0.6 dB typical)
• Residual FM: <15 Hz (300 Hz to 3 kHz bandwidth)
• Residual AM: <0.1% rms (300 Hz to 3 kHz bandwidth)
• Harmonics at 0 dBm: <-35 dBc (typically –45 dBc)
• Spurious signals: Better than –55 dBc
Audio Generator
• Output range: 1 mV to 5 V rms
• Level accuracy: ±1% of setting
• Frequency range: 20 Hz to 40 kHz (50 ppm accuracy, 10 ppm typical, 0.1 Hz resolution)
• AF counter: 20 Hz to 20 kHz
• FM pre-emphasis/de-emphasis: 50 μs, 75 μs, 750 μs
Spectrum Analyzer
• Full span: 1 MHz to 1 GHz
• DANL: -140 dBm (typical)
• Markers: 8
Oscilloscope
• Dual-channel, 4 MHz baseband analysis
– Key Features
• AM and FM modulation analysis with full RF parametric testing
• Power, frequency error, deviation, and modulation index measurements
• P25, TETRA, and HPD digital communications testing
• TETRA network emulation with registration, group attachment, and call processing (mobile and base station)
• Multiple call type support: group, private, emergency, telephone
– Typical Applications
• Mobile terminal and base station verification
• Off-air signal analysis
• Radio system development and validation
• Manufacturing test and acceptance
• Field service and maintenance
– Compatibility & Integration
The 3901 supports TETRA mobile station and base station testing via Options 110 and 111, with network emulation capabilities for call processing validation.
